Browsing the Pluto forums shows that the intermatic is not recognized, i would assume that you would run into the same issues with linuxmce. It seems that the most reliable (and confirmed working) usb z wave device is the homepro ZCU000. Unfortunately it has been discontinued but a new version has been scheduled for release some time this year. I for one will wait for the new homepro.

unfortunately, for now, your most likely support will be from the Serial version of the ZCU000. The Serial version is the ZCS000. In fact, the usb version is nothing more than the serial version with an onboard serial-to-usb conversion.

LinuxMCE is a direct branch (afaik) of plutohome and the support for the serial adapter is in plutohome. So I am assuming that the support is also in linuxMCE. However, I cannot confirm that it works under LinuxMCE.